// PullDockerImage pulls an image and streams to a logger respecting terminal features
func PullDockerImage(client *docker.Client, image *imagename.ImageName, auth *docker.AuthConfigurations) (*docker.Image, error) {
if image.Storage == imagename.StorageS3 {
s3storage := s3.New(client, os.TempDir())
if err := s3storage.Pull(image.String()); err != nil {
return nil, err
}
} else {
pipeReader, pipeWriter := io.Pipe()
pullOpts := docker.PullImageOptions{
Repository: image.NameWithRegistry(),
Registry: image.Registry,
Tag: image.Tag,
OutputStream: pipeWriter,
RawJSONStream: true,
}
repoAuth, err := dockerclient.GetAuthForRegistry(auth, image)
if err != nil {
return nil, fmt.Errorf("Failed to authenticate registry %s, error: %s", image.Registry, err)
}
errch := make(chan error, 1)
go func() {
err := client.PullImage(pullOpts, repoAuth)
if err := pipeWriter.Close(); err != nil {
log.Errorf("Failed to close pull image stream for %s, error: %s", image, err)
}
errch <- err
}()
def := log.StandardLogger()
fd, isTerminal := term.GetFdInfo(def.Out)
out := def.Out
if !isTerminal {
out = def.Writer()
}
if err := jsonmessage.DisplayJSONMessagesStream(pipeReader, out, fd, isTerminal); err != nil {
return nil, fmt.Errorf("Failed to process json stream for image: %s, error: %s", image, err)
}
if err := <-errch; err != nil {
return nil, fmt.Errorf("Failed to pull image %s, error: %s", image, err)
}
}
img, err := client.InspectImage(image.String())
if err != nil {
return nil, fmt.Errorf("Failed to inspect image %s after pull, error: %s", image, err)
}
return img, nil
}
// RegistryListTags returns the list of images instances obtained from all tags existing in the registry
func RegistryListTags(image *imagename.ImageName, auth *docker.AuthConfigurations) (images []*imagename.ImageName, err error) {
var (
name = image.Name
registry = image.Registry
)
regAuth, err := GetAuthForRegistry(auth, image)
if err != nil {
return nil, fmt.Errorf("Failed to get auth token for registry: %s, make sure you are properly logged in using `docker login` or have AWS credentials set in case of using ECR", image)
}
// XXX: AWS ECR Registry API v2 does not support listing tags
// wo we just return a single image tag if it exists and no wildcards used
if image.IsECR() {
log.Debugf("ECR detected %s", registry)
if !image.IsStrict() {
return nil, fmt.Errorf("Amazon ECR does not support tags listing, therefore image wildcards are not supported, sorry: %s", image)
}
if exists, err := ecrImageExists(image, regAuth); err != nil {
return nil, err
} else if exists {
log.Debugf("ECR image %s found in the registry", image)
images = append(images, image)
}
return
}
if registry == "" {
registry = "registry-1.docker.io"
if !strings.Contains(name, "/") {
name = "library/" + name
}
}
var (
tg = tags{}
url = fmt.Sprintf("https://%s/v2/%s/tags/list?page_size=9999&page=1", registry, name)
)
log.Debugf("Listing image tags from the remote registry %s", url)
if err := registryGet(url, regAuth, &tg); err != nil {
return nil, err
}
log.Debugf("Got %d tags from the remote registry for image %s", len(tg.Tags), image)
for _, t := range tg.Tags {
candidate := imagename.New(image.NameWithRegistry(), t)
if image.Contains(candidate) || image.Tag == candidate.Tag {
images = append(images, candidate)
}
}
return
}